page{
  position: relative;
  width: 100%;
  height: 100%;
}
.title-icon {
  display: inline-block;
  width: 22px;
  height: 36px;
}
sweep-code{
  width: 100%;
  height: 100%;
}

.code-btn {
  position: fixed;
  top: 40rpx;
  left: 0rpx;
  z-index: 10001;
  width: 44px;
  height: 44px;
  line-height: 44px;
  text-align: center;
  background: transparent;
}

.left-allow{
 
}

.back-btn{
  font-size: 40px;
}